Some Neapolitans help a firm from Milan to establish two factories in Naples: one produces TV dinner pizzas the other manufactures lace. The owner of a pizza joint and a woman who makes lace at home are against the project.

Bored with her bourgeois life, the young Maria Variani, daughter of a professor, meets Bruno, who is part of an amateur jazz group, and allows herself to be persuaded to join the band that plays during the radio program "The microphone is yours".

A gangster comes back to Rome after many years and meets his old flame and their daughter.